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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (test-discovery)
+ #:use-module (guix discovery)
+ #:use-module (guix build-system)
+ #:use-module (srfi srfi-64)
+ #:use-module (ice-9 match))
+
+(define %top-srcdir
+ (dirname (search-path %load-path "guix.scm")))
+
+(test-begin "discovery")
+
+(test-assert "scheme-modules"
+ (match (map module-name (scheme-modules %top-srcdir "guix/import"))
+ ((('guix 'import _ ...) ..1)
+ #t)))
+
+(test-assert "all-modules"
+ (match (map module-name
+ (all-modules `((,%top-srcdir . "guix/build-system"))))
+ ((('guix 'build-system names) ..1)
+ names)))
+
+(test-assert "fold-module-public-variables"
+ (let ((modules (all-modules `((,%top-srcdir . "guix/build-system")))))
+ (match (fold-module-public-variables (lambda (obj result)
+ (if (build-system? obj)
+ (cons obj result)
+ result))
+ '()
+ modules)
+ (((? build-system? bs) ..1)
+ bs))))
+
+(test-end "discovery")